System and method for treatment of cellulose-containing material prior to pulp digestion
US6280567A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 2000 |
| Grant date | Aug 28, 2001 |
| Priority date | — |
| Expiry date | Apr 12, 2020 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C1/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a process system and a method for preliminary treatment of disintegrated cellulose-containing material, preferably wood chips, prior to pulp digestion. The process system and the method according to the invention make use of a process vessel intended to function both as a so-called chip bin and as a pre-impregnation vessel. The characteristics of the invention are that a sloping steaming vessel is arranged downstream of the process vessel for the purpose of separating an excess of pre-impregnation liquid from the pre-impregnated cellulose-containing material, that the sloping steaming vessel is arranged for supplying steaming vapor which preferably has been generated by flashing of extraction liquor from a pulp digester, and that the sloping steaming vessel is connected to a chip chute communicating with a condenser for connection to a system for managing foul-smelling process gases. The invention can be applied in the production of pulp which is intended for paper manufacture or other applications where cellulose fibers are used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.